VOLVO
ECM-253B - Front heated oxygen sensor (HO2S), bank 2. Signal missing
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS80 (1999–2006), XC90 (2003–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
Although the code is titled signal missing, it applies when the voltage used to heat the oxygen sensor on bank 2 disturbs the sensor's signal. The engine control module (ECM) stores the code when this happens.
Mulige årsaker
- One of the heater cables is short-circuited to the sensor's other signal cables
- Damaged front heated oxygen sensor
Hva du kan gjøre
- 1Read and note the code, clear it and road test to see whether it returns
- 2Check the bank 2 oxygen sensor connector for a firm fit and cleanliness. Rust solvent spray and grease must not be used
- 3Follow the cables from the sensor and look for chafing, damaged insulation and places where two cables may have touched
- 4Use a multimeter to check that the heater cables are not short-circuited to the sensor's signal cables
- 5If the cables are intact, have a workshop decide whether the oxygen sensor needs replacing
Symptomer du kan merke1
- The malfunction indicator lamp (MIL) is lit
Hva feilen kan påvirke2
- Oxygen sensor control is switched off
- Catalytic converter diagnostics are switched off
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.